摘要
以陷阱电荷限制传导理论为基础 ,用数值方法研究了单层有机电致发光器件发光层中电势、电场和载流子密度的空间分布 .分析结果表明 ,电场强度在靠近两边电极的地方上升很快 ,而在中间区域几乎是线性地缓慢增大 .大部分载流子分布在靠近两个电极的地方 ,只有少量分布在中间区域 .在靠近注入电极的地方扩散电流大于漂移电流 ,而在其它区域漂移电流大于扩散电流 .
The electrical potential,field and carrier density in emission layer of single layer organic light-emitting devices are numerically studied based on the trapped charge limited conduction theory.The electric field increases rapidly near the two electrodes,while slowly and nearly lineally in the rest regions.The most charge carriers distribute near the two electrodes and only a small amount of them distribute over the rest region.The diffusion current is the dominant component near the injection electrode,whereas the drift current dominates the rest region of the emission layer.
基金
国家自然科学基金资助项目 (批准号 :6 0 0 76 0 2 3)~~
关键词
发光层
有机电致发光
电场分布
载流子分布
数值研究
organic electroluminescence
electric field distribution
carrier distribution
numerical study
